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document FUNCTION-ALIAS:

release
Joe Groff 2010-04-14 16:14:33 -07:00
parent 5b470d8da9
commit 54015782f3
2 changed files with 17 additions and 4 deletions
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20
basis/alien/syntax/syntax-docs.factor
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@ -26,9 +26,9 @@ HELP: LIBRARY:
{ $notes "Logical library names are defined with the " { $link add-library } " word." } ;
HELP: FUNCTION:
{ $syntax "FUNCTION: return name ( parameters )" }
{ $syntax "FUNCTION: return name ( parameters ) ;" }
{ $values { "return" "a C return type" } { "name" "a C function name" } { "parameters" "a comma-separated sequence of type/name pairs; " { $snippet "type1 arg1, type2 arg2, ..." } } }
{ $description "Defines a new word " { $snippet "name" } " which calls a C library function with the same name, in the logical library given by the most recent " { $link POSTPONE: LIBRARY: } " declaration."
{ $description "Defines a new word " { $snippet "name" } " which calls the C library function with the same " { $snippet "name" } " in the logical library given by the most recent " { $link POSTPONE: LIBRARY: } " declaration."
$nl
"The new word must be compiled before being executed." }
{ $examples
@ -45,11 +45,23 @@ $nl
"The answer to the question is 42."
} }
"Using the " { $link c-string } " type instead of " { $snippet "char*" } " causes the FFI to automatically convert Factor strings to C strings. See " { $link "c-strings" } " for more information on using strings with the FFI."
{ $notes "Note that the parentheses and commas are only syntax sugar and can be omitted; they serve no purpose other than to make the declaration slightly easier to read:"
{ $notes "Note that the parentheses and commas are only syntax sugar and can be omitted; they serve no purpose other than to make the declaration easier to read. The following definitions are equivalent:"
{ $code
"FUNCTION: void glHint ( GLenum target, GLenum mode ) ;"
"FUNCTION: void glHint GLenum target GLenum mode ;"
} } ;
}
"To make a Factor word with a name different from the C function, use " { $link POSTPONE: FUNCTION-ALIAS: } "." } ;
HELP: FUNCTION-ALIAS:
{ $syntax "FUNCTION-ALIAS: factor-name
return c_name ( parameters ) ;" }
{ $values { "factor-name" "a Factor word name" } { "return" "a C return type" } { "name" "a C function name" } { "parameters" "a comma-separated sequence of type/name pairs; " { $snippet "type1 arg1, type2 arg2, ..." } } }
{ $description "Defines a new word " { $snippet "factor-name" } " which calls the C library function named " { $snippet "c_name" } " in the logical library given by the most recent " { $link POSTPONE: LIBRARY: } " declaration."
$nl
"The new word must be compiled before being executed." }
{ $notes "Note that the parentheses and commas are only syntax sugar and can be omitted. They serve no purpose other than to make the declaration easier to read." } ;
{ POSTPONE: FUNCTION: POSTPONE: FUNCTION-ALIAS: } related-words
HELP: TYPEDEF:
{ $syntax "TYPEDEF: old new" }

1
core/alien/alien-docs.factor
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@ -213,6 +213,7 @@ ARTICLE: "alien-invoke" "Calling C from Factor"
{ $subsections
POSTPONE: LIBRARY:
POSTPONE: FUNCTION:
POSTPONE: FUNCTION-ALIAS:
}
"The above parsing words create word definitions which call a lower-level word; you can use it directly, too:"
{ $subsections alien-invoke }